Re: Client host rejected

hummmm ... help me out here ! So that means the relay server mx1.tap.pt[91.198.90.27]:25 is rejecting user1@mydomain.com from sending emails to user2@otherdomain.com ? And that's the reason from this rejection ?

Re: Client host rejected

But why the persistence of sending over and over this email without the sender action ? Should postfix have a sending limit with DNS errors ? Why postfix can just quit this email from his delivery queue ?!